package com.ruoyi.web.controller.common;

import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
//@Api(tags = {"文件处理接口（上传/下载）"})
public class CommonController {

    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    @Value("${file.upload-dir}")
    private String uploadDir;

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
//    @ApiOperation( "通用文件下载")
    @ApiOperation(value = "通用文件下载")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    @PostMapping("/upload")
    @ApiOperation("通用文件上传（单个）")
    public AjaxResult<Map<String, Object>> uploadFile(MultipartFile file, HttpServletRequest request) throws Exception {
        if (file.isEmpty()) {
            return AjaxResult.error("文件不能为空");
        }

        try {
            String originalFileName = file.getOriginalFilename(); // 获取原始文件名
            String fileNameWithoutExtension = originalFileName.substring(0, originalFileName.lastIndexOf('.')); // 移除文件后缀
            String extension = originalFileName.substring(originalFileName.lastIndexOf('.')); // 获取文件后缀

            String newFileName = System.currentTimeMillis() + "_" + fileNameWithoutExtension + extension; // 新文件名，包含后缀

            // 文件存储的完整路径包括日期路径
            Path path = Paths.get(uploadDir + File.separator + newFileName);

            // 确保目录存在
            Files.createDirectories(path.getParent());

            Files.write(path, file.getBytes());

            // 构建动态的文件访问URL
            String encodedFileName = URLEncoder.encode(newFileName, StandardCharsets.UTF_8.name()).replace("+", "%20");
            String fileAccessUrl = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath() + "/system/file/download/" + encodedFileName;

            Map<String, Object> resultMap = new HashMap<>();
            resultMap.put("url", fileAccessUrl); // 文件的URL地址
            resultMap.put("fileName", fileNameWithoutExtension); // 原始文件名
            resultMap.put("newFileName", newFileName); // 新文件名（处理后的文件名，包含后缀）
            resultMap.put("originalFilename", originalFileName); // 原始文件名（包含后缀）

            return AjaxResult.success(resultMap);
        } catch (IOException e) {
            e.printStackTrace();
            return AjaxResult.error("文件上传失败");
        }
    }



    public AjaxResult<Map<String, Object>> uploadFile(MultipartFile file) throws Exception {

        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
           // AjaxResult ajax = AjaxResult.success();
            Map<String, Object> map = new HashMap<>();
            map.put("url", url);
            map.put("fileName", fileName);
            map.put("newFileName", FileUtils.getName(fileName));
            map.put("originalFilename", file.getOriginalFilename());
            return AjaxResult.success(map);
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    @ApiOperation("通用文件上传（多个）")
    public AjaxResult<Map<String, Object>> uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
           // AjaxResult ajax = AjaxResult.success();
            Map<String, Object> map = new HashMap<>();
            map.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            map.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            map.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            map.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return AjaxResult.success(map);
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    @ApiOperation("本地资源通用下载")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }
}
